A polarizing film setting jig

Abstract

The utility model provides a kind of polarizing film setting fixture, belong to resin spectacle lens technical field.The technical problem of low quality of polarizing film after clamping bending is solved.The technical scheme is as follows: a kind of polarizing film setting fixture, including upper platform and lower platform, the lower platform is used to place setting base, the upper platform and lower platform are connected with several stop bars, the upper platform is provided with screw rod, the lower end of screw rod passes through upper platform and is connected with upper platform threadedly, the lower end of screw rod is also provided with top block, and the top block is used to contact with the edge of setting mold.The utility model has the beneficial effect that: stop bar can limit the relative position of polarizing film, setting mold and setting base, and the edge contact of top block and setting mold can make the force of setting mold pressed on polarizing film more uniform, so as to improve the quality of polarizing film after clamping bending.

Description

Technical Field

[0001] This utility model relates to the field of resin lens technology, and in particular to a polarizing film shaping clamp. Background Technology

[0002] TAC polarizing film is a common type of polarized sunglasses. Lenses with different curvatures require polarizing films with different curvatures. Therefore, the accuracy and consistency of the curvature are crucial when bending polarizing films.

[0003] In the prior art, when bending polarizing film, a shaping base is first placed on the bending fixture. The upper surface of the shaping base is concave, and the curvature of the concave surface is the required curvature of the polarizing film. Then, a shaping mold is placed in the concave surface of the shaping base. The shaping mold is a curved sheet mold, and its curvature is the same as that of the concave surface of the shaping base. Then, the polarizing film is placed on the shaping mold, and then another shaping mold is placed, and then another polarizing film is placed, until the fixture has its maximum capacity. Then, the screw on the fixture is rotated to press down and clamp several polarizing films. The polarizing film is clamped between the shaping molds to the required curvature.

[0004] When the fixture clamps the polarizing film, displacement can easily occur between the polarizing film, the shaping mold, and the shaping base. Furthermore, the downward pressure on the shaping mold from the screw is relatively concentrated, resulting in uneven force clamping the polarizing film. This can easily lead to edge wrinkles or inconsistent curvature of the polarizing film, resulting in lower quality of the bent polarizing film. Summary of the Invention

[0005] The purpose of this invention is to provide a shaping fixture that can improve the quality of polarizing film after bending.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a polarizing film shaping fixture, comprising an upper platform and a lower platform, wherein the lower platform is used to place the shaping base, and a plurality of stop bars are connected between the upper platform and the lower platform. A screw is provided on the upper platform, the lower end of which passes through the upper platform and is threadedly connected to the upper platform. A top block is also provided at the lower end of the screw, wherein the minimum width of the lower surface of the top block is greater than the diameter of the shaping mold, and the top block is used to contact the edge of the shaping mold.

[0007] Furthermore, a positioning groove for accommodating the shaping base is provided on the lower platform, and the positioning groove extends through the lower platform.

[0008] Furthermore, the inner wall of the positioning groove is provided with a positioning step for placing the shaping base. The positioning step can ensure that the pressure surface of the shaping base is always perpendicular to the pressure direction when it is in the fixture.

[0009] Furthermore, the number of the aforementioned stop levers is three, wherein two of the stop levers are positioned opposite each other between the upper platform and the lower platform, and the third stop lever is positioned on one side of the two stop levers at a 90-degree angle.

[0010] Furthermore, the number of the aforementioned stop bars is three, and the three stop bars are evenly arranged between the upper platform and the lower platform. The lines connecting adjacent stop bars form an equilateral triangle. One of the stop bars includes a fixed rod and a movable rod, and the movable rod and the fixed rod are detachably connected. The fixed rod is connected to the lower platform, and a through hole is opened on the upper platform for the movable rod to pass through.

[0011] Furthermore, the upper end of the screw is connected to a screw head, which is used by the operator's hand to grasp it.

[0012] Furthermore, a torque wrench is provided on the screw head, and a torque display is connected to the torque wrench.

[0013] Furthermore, a thrust bearing is provided between the lower end of the screw and the top block.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] 1. The stop bar can limit the relative positions of the polarizing film, the shaping mold and the shaping base. The contact between the top block and the edge of the shaping mold can make the force of the shaping mold pressing on the polarizing film more uniform, thereby improving the quality of the polarizing film after bending.

[0016] 2. When the shaping base is placed in the positioning groove, the positioning base rests on the positioning step, so that the pressure surface of the shaping base is always perpendicular to the pressure direction when it is in the fixture.

[0017] 3. The thrust bearing can prevent sliding friction between the screw and the top block and convert it into rolling friction, thereby reducing wear between the screw end and the top block surface. Attached Figure Description

[0018] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.

[0019] Figure 1 This is a cross-sectional structural diagram of Embodiment 1 of the present invention.

[0020] Figure 2 This is a cross-sectional structural diagram of Embodiment 2 of this utility model.

[0021] The attached diagram is labeled as follows: 1. Upper platform; 11. Through hole; 12. Screw; 121. Screw head; 2. Lower platform; 21. Positioning groove; 22. Positioning step; 3. Stop bar; 31. Fixed rod; 32. Movable rod; 4. Top block; 5. Tightening wrench; 51. Torque display; 6. Thrust bearing. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. Of course, the specific embodiments described herein are only for explaining this utility model and are not intended to limit it.

[0023] Example 1

[0024] See Figure 1 The present invention provides a technical solution as follows: a polarizing film shaping fixture, comprising an upper platform 1 and a lower platform 2, both of which are circular platforms. Three stops 3 are fixedly connected between the upper platform 1 and the lower platform 2, wherein two stops 3 are positioned opposite each other between the upper platform 1 and the lower platform 2, and the other stop 3 is positioned on one side of the two stops 3 at a 90-degree angle.

[0025] Preferably, a positioning groove 21 is provided on the lower platform 2, the positioning groove 21 penetrates the lower platform 2, and a positioning step 22 is provided on the inner wall of the positioning groove 21, the radial direction of the positioning step 22 is perpendicular to the axial direction of the screw 12.

[0026] Preferably, a screw 12 is threaded through the upper platform 1 and connected to the upper platform 1 by a thread. The upper end of the screw 12 is connected to a screw head 121. In this embodiment, the overall shape of the screw head 121 is a circle with a diameter larger than that of the screw 12. The edge of the screw head 121 is irregular, making it easy for the operator to handle. A top block 4 is provided at the lower end of the screw 12. The top block 4 is a circular aluminum block with a diameter larger than that of the forming mold. The top block 4 can be selected to be connected to the screw 12 as needed. In this embodiment, the screw 12 and the top block 4 are separate. When needed, the top block 4 can be placed below the screw 12.

[0027] Preferably, a tightening wrench 5 is provided on one side of the screw head 121, and a sleeve is provided at the end of the tightening wrench 5. The groove provided on the lower surface of the sleeve is a groove that matches the edge of the screw head 121. The sleeve can cover the screw head 121, and the screw head 121 is inserted into the groove of the sleeve. A torque display instrument 51 is connected to the tightening wrench 5.

[0028] Preferably, a thrust bearing 6 is provided between the lower end of the screw 12 and the top block 4. The thrust bearing 6 is embedded in the mounting groove opened on the top block 4. A pressure block is connected to the lower end of the screw 12. The minimum width of the lower surface of the pressure block is greater than the diameter of the screw 12, and the pressure block can fully contact the thrust bearing 6.

[0029] When bending the polarizing film, place the shaping fixture on a horizontal platform. Select a shaping base with the same curvature as the required curvature of the polarizing film. Place the shaping base in the positioning groove 21, with the positioning step 22 supporting the shaping base, and the concave side of the shaping base facing upwards. Select a shaping mold with the same curvature, placing it with its concave side facing upwards inside the concave surface of the shaping base, with the convex side of the shaping mold fitting against the concave surface of the shaping base. Then, place a polarizing film in the concave part of the shaping mold. Repeat this process further. The shaping mold and polarizing film are placed alternately until the maximum capacity of the fixture is met, and the topmost part is always the shaping mold. The top block 4 is placed on the topmost shaping mold, with the side of the top block 4 with the thrust bearing 6 facing upwards, and the lower surface of the top block 4 in complete contact with the circular edge of the shaping mold. Since one stop bar 3 is located on one side of the two opposite stop bars 3 at a 90-degree angle, when the shaping base, shaping mold and polarizing film are placed in the fixture, they can be put into the fixture through the other side of the two opposite stop bars 3.

[0030] Tightening the screw head 121 causes the screw 12 to move downwards, which in turn causes the pressure block to move downwards until it contacts the thrust bearing 6. This further pushes the top block 4 downwards, clamping and pressing the stacked shaping molds and polarizing film below, thus bending the polarizing film. When the screw 12 presses down, the operator gently supports the shaping molds on one side of the stop bar 3, ensuring that the sides of several shaping molds contact the three stop bars 3. This achieves horizontal limitation during pressing, preventing displacement between the shaping base, shaping molds, and polarizing film. At the same time, the top block 4 contacts the circular edge of the shaping mold and applies pressure, ensuring that the pressure exerted by the shaping mold on the polarizing film starts from the edge and is evenly distributed. This prevents the polarizing film from developing edge wrinkles or inconsistent curvature after pressing, thus improving the quality of the polarizing film.

[0031] When there are specific requirements for the downward pressure of the polarizing film, the torque wrench 5 can be taken out, the sleeve can be placed on the screw head 121, and the torque wrench 5 can be pulled to drive the screw head 121 and the screw rod 12 to rotate and apply pressure to the top block 4. At this time, the torque display instrument 51 will display the torque on the torque wrench 5. When the torque increases to the preset value, the force application will stop.

[0032] Example 2

[0033] See Figure 2The difference from Embodiment 1 is that the three stop rods 3 are evenly arranged between the upper platform 1 and the lower platform 2, and the line connecting each two adjacent stop rods 3 forms an equilateral triangle. One of the stop rods 3 includes a fixed rod 31 and a movable rod 32. The fixed rod 31 and the movable rod 32 are detachably set. In this embodiment, the fixed rod 31 and the movable rod 32 are threaded together. The fixed rod 31 has a screw hole, and the lower end of the movable rod 32 is provided with a threaded rod. The threaded rod is threaded into the screw hole to realize the connection between the fixed rod 31 and the movable rod 32. A through hole 11 is opened on the upper platform 1 to allow the movable rod 32 to pass through. When the movable rod 32 and the fixed rod 31 are connected, the upper end of the movable rod 32 is still partially located in the through hole 11.

[0034] When placing the shaping base, shaping mold, and polarizing film into the fixture, first remove the movable rod 32 from the fixed rod 31 and move it upwards to be taken out from the through hole 11. This creates a notch between the upper end of the fixed rod 31 and the upper platform 1, allowing the shaping base, shaping mold, and polarizing film to be moved into the fixture through this notch. After placing the last shaping mold, move the movable rod 32 through the through hole 11 and connect it to the fixed rod 31 to form a complete stop rod 3. This stop rod, along with the other two stop rods 3, limits the shaping mold. When the screw 12 is pressed down, the operator does not need to hold it from the side, making the operation of the fixture more convenient.

[0035] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A polarizing film shaping fixture, comprising an upper platform (1) and a lower platform (2), wherein the lower platform (2) is used to place a shaping base, characterized in that, A number of stop bars (3) are connected between the upper platform (1) and the lower platform (2). A screw (12) is provided on the upper platform (1). The lower end of the screw (12) passes through the upper platform (1) and is threadedly connected to the upper platform (1). A top block (4) is also provided at the lower end of the screw (12). The top block (4) is used to contact the edge of the shaping mold.

2. The polarizing film shaping fixture according to claim 1, characterized in that, The lower platform (2) has a positioning groove (21) for accommodating the shaping base.

3. The polarizing film shaping fixture according to claim 2, characterized in that, The inner wall of the positioning groove (21) is provided with a positioning step (22) for placing the shaping base.

4. The polarizing film shaping fixture according to claim 1, characterized in that, The number of the aforementioned stop bars (3) is three, wherein two of the stop bars (3) are positioned opposite each other between the upper platform (1) and the lower platform (2), and the other stop bar (3) is positioned on one side of the two stop bars (3).

5. The polarizing film shaping fixture according to claim 1, characterized in that, The number of the aforementioned stop bars (3) is three, and the three stop bars (3) are evenly arranged between the upper platform (1) and the lower platform (2). One of the stop bars (3) includes a fixed rod (31) and a movable rod (32). The movable rod (32) is detachably connected to the fixed rod (31). The fixed rod (31) is connected to the lower platform (2). A through hole (11) is opened on the upper platform (1) for the movable rod (32) to pass through.

6. The polarizing film shaping fixture according to claim 1, characterized in that, The upper end of the screw (12) is connected to the screw head (121), which is used by the operator to hold it.

7. The polarizing film shaping fixture according to claim 6, characterized in that, A torque wrench (5) is provided on the screw head (121), and a torque display instrument (51) is connected to the torque wrench (5).

8. The polarizing film shaping fixture according to claim 1, characterized in that, A thrust bearing (6) is provided between the lower end of the screw (12) and the top block (4).

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